Author: Bikash Panda

A techie, tinkerer and tech lover, who loves to blog and feels everyone can learn tech provided they have the right attitude towards learning and passion. By profession, I am an IOT developer working in Smart Home/ Smart Grid domain.

This tutorial is all about using the watchdog timer of Raspberry Pi by using JAVA. For this, we are going to use Pi4J library. Watchdog Timer: “A watchdog timer (sometimes called a computer operating properly or COP timer, or simply a watchdog) is an electronic timer that is used to detect and recover from computer malfunctions. During normal operation, the computer regularly resets the watchdog timer to prevent it from elapsing, or “timing out”. If due to a hardware fault or program error, the computer fails to reset the watchdog, the timer will elapse and generate a timeout signal.…

In this tutorial, we will see how to program the Atmega324 controller of Linkit Smart 7688 DUO module using the Arduino IDE. The boards come in two flavors, Linkit Smart 7688 and Linkit Smart DUO. The difference between both is that the DUO has an ATMEGA324 controller apart from the main MPU which can be programmed using Arduino. In DUO module GPIOs of both the MPU as well as MCU are exposed and some are even multiplexed. The MCU can also be interfaced or controlled using the MPU but in…

Firmata is a protocol that is used to communicate with microcontrollers from any tablet/pc over the serial interface. There are implementations of this for other platforms too along with Arduino. You can find support for this if you are using any Arduino IDE released after 2008.Use of this protocol lets you access GPIO of Arduino from any host device natively without uploading the sketch each time you change the sketch. You can use Arduino as ADC for your Pi as it doesn’t have native ADC pins, you can also interface…

This is a simple project to make IOT enabled power outlet. This video is around WeMOS and demonstrates how to use WeMOS with thingspeak to control some loads in my home. This project lets you control your devices which you need to connect to the output sockets. As an online server, I have used Thinspeak.com but you can use any server but you just need REST API. Check out the video to get started.

A video about the installation of OSMC onto Raspberry Pi to make a complete media center for home entertainment. The video shows how to install OS as well as configuring it such that it can be accessed by Android App so that it can be controlled wirelessly. Check out the video for more details.

This video around raspberry pi showing how to interface DHT12 humidity and temperature sensor with raspberry pi by using JAVA nad Pi4j. DHT12 its a temperature sensor with a 1-Wire and I2C interface to connect with external controllers and having 1-Wire interface makes it compatible with the older DHT11 sensor but with a higher accuracy. For this tutorial, we are going to use the I2C interface of the sensor and to interact with it, we will be using JAVA. One issue with the DHT12 I2C interface is that the device…

This is the third video in the series “IOT with Raspberry Pi” and that’s using JAVA. The series comprises of Sensor interfacing using pi4J, REST API usage with JAVA, MQTT usage with JAVA and finally adding all to the same project and running over Raspberry Pi. last two videos shows how to interface DS18B20 1 wire temperature sensor with Raspberry Pi and send data to Thingspeak by using REST API with JAVA. If you have not checked those you can do that with the links down below. This video is…

This video is around Raspberry Pi to showcase the usage of Raspberry Pi in IOT projects and that’s using JAVA. This is going to be a series of video including Sensor interfacing using pi4J, REST API usage with JAVA, MQTT usage with JAVA and finally adding all to the same project and running over Raspberry Pi. So this video is going to be the first part of it where we will see how to interface DS18B20 one wire temperature sensor with Raspberry Pi by using JAVA with the help of…

The NanoPi S2(S2) is designed and developed by FriendlyElec for professionals, enterprise users, makers, and hobbyists. It is a small board with WiFi, Bluetooth, and eMMC. It uses the Samsung Quad Core Cortex-A9 S5P4418 SoC with dynamic frequency scaling up to 1.4GHz. It has 1G DDR3 RAM, 802.11 b/g/n WiFi & Bluetooth 4.0 module. Its inbuilt power management unit uses the AXP228 chip which supports software shutdown. It takes power over the MicroUSB port. It has video input/output interface, 3.5mm audio jack, USB port, and MicroSD card slot, serial debug…

The NanoPi S2(S2) is designed and developed by FriendlyElec for professionals, enterprise users, makers, and hobbyists. It is a small board with WiFi, Bluetooth, and eMMC. It uses the Samsung Quad Core Cortex-A9 S5P4418 SoC with dynamic frequency scaling up to 1.4GHz. It has 1G DDR3 RAM, 802.11 b/g/n WiFi & Bluetooth 4.0 module. Its inbuilt power management unit uses the AXP228 chip which supports software shutdown. It takes power over the MicroUSB port. It has video input/output interface, 3.5mm audio jack, USB port, and MicroSD card slot, serial debug…